Sliding rail mechanism for helicopter sliding fairing and helicopter sliding fairing

Abstract

The invention discloses a sliding rail mechanism for a helicopter sliding fairing and the helicopter sliding fairing, and the sliding rail mechanism comprises three sliding rails which are respectively two side sliding rails which are fixedly mounted on a power platform and are symmetrically arranged, and a middle sliding rail which is fixedly mounted on one side wall of a firewall; wherein all the sliding rails are installed in parallel in the heading direction, a dismounting and mounting opening is formed in the middle of each sliding rail, when a pulley at the corresponding position on the sliding fairing slides on the sliding rail at the corresponding position, the pulley is disengaged from and mounted in the dismounting and mounting opening, and a middle blanking cap assembly is arranged at the position of each dismounting and mounting opening; the pulley of the sliding fairing is prevented from being separated from the sliding rail at the corresponding position in the sliding process; each sliding rail is provided with a first limiting mechanism used for preventing a pulley at the corresponding position in the sliding fairing from disengaging from the disassembling and assembling opening position of the sliding rail. Each sliding rail is further provided with a second limiting mechanism used for limiting a pulley at the corresponding position in the sliding fairing to the disassembly and assembly opening position of the sliding rail. Each side sliding rail is provided with a buffering and limiting mechanism used for limiting a pulley at the corresponding position in the sliding fairing to the completely-opened position of the sliding fairing.

Description

Technical Field

[0001] The invention relates to the field of, but not limited to, the technical field of helicopter structural design, and in particular to a slide rail mechanism for a helicopter sliding fairing and a helicopter sliding fairing. Background Art

[0002] A sliding fairing is usually installed on the power platform of a helicopter. The sliding fairing in existing helicopters is usually disassembled and assembled from the front end or rear end of a slide rail.

[0003] However, when disassembling the sliding fairing from the front or rear end, there is often a problem that structural parts on the helicopter interfere with it, making disassembly difficult or impossible. Summary of the invention

[0004] The purpose of the present invention is: in order to solve the above-mentioned problem, the embodiment of the present invention provides a slide rail mechanism for a helicopter sliding fairing and a helicopter sliding fairing, so as to solve the problem that the sliding fairing in the existing helicopter interferes with the structural parts on the helicopter when being disassembled from the front end or the rear end, thereby making it difficult or impossible to disassemble.

[0005] The technical solution of the present invention is as follows: In the first aspect, the embodiment of the present invention provides a slide rail mechanism for a helicopter sliding fairing, comprising: three slide rails, namely: two side slide rails 1 fixedly mounted on a power platform 4 and symmetrically arranged, and a middle slide rail 3 fixedly mounted on a side wall of a firewall 5;

[0006] Each slide rail is installed in parallel along the heading direction, and a disassembly opening is provided in the middle of each slide rail, which is used for the pulley 6 at the corresponding position of the sliding fairing to be removed from and installed in the disassembly opening when sliding on the slide rail at the corresponding position, and an intermediate blocking cover assembly is provided at each disassembly opening position to prevent the pulley 6 of the sliding fairing from being removed from the slide rail at the corresponding position during the sliding process;

[0007] Each slide rail is provided with a first limiting mechanism 7 for preventing the pulley 6 at the corresponding position in the sliding fairing from escaping from the disassembly and assembly opening position of the slide rail; each slide rail is also provided with a second limiting mechanism for limiting and fixing the pulley 6 at the corresponding position in the sliding fairing at the disassembly and assembly opening position of the slide rail; and each side slide rail 1 is provided with a buffer and limiting mechanism 8 for limiting the pulley 6 at the corresponding position in the sliding fairing to the fully open position of the sliding fairing.

[0008] Optionally, in the slide rail mechanism for the helicopter sliding fairing as described above, the first limit mechanism 7 provided at the disassembly opening position of each side slide rail 1 comprises: a first intermediate blocking cover assembly 10 and a countersunk screw 9;

[0009] Among them, the first intermediate blocking cover assembly 10 includes: a slide rail opening cover 11 whose inner surface is consistent with the inner surface of the side slide rail 1, and the connecting part of the slide rail opening cover 11 is fixedly installed on the disassembly opening position of the side slide rail 1 by countersunk screws 9, so that the slide rail part and the side slide rail 1 form an integral slideway, so that the pulley 6 slides between the side slide rail 1 and the slide rail opening cover 11.

[0010] Optionally, in the slide rail mechanism for a helicopter sliding fairing as described above, the first intermediate blocking cover assembly 10 of each side slide rail 1 further includes: two limit pins 12;

[0011] The slide rail opening cover 11 is configured to be L-shaped, and the two limit pins 12 are interference-fitted with the holes on the connecting portion of the slide rail opening cover 11;

[0012] The limiting method of the side slide rail 1 is as follows: when the sliding fairing is not disassembled, the slide rail opening cover 11 is fixedly connected to the side wall of the side slide rail 1 through its connecting part, and forms an integral slideway with the side slide rail 1 through its slide rail part, and two limiting pins 12 are located on the back side of the side wall of the side slide rail 1;

[0013] When disassembling the sliding fairing, remove the countersunk screws 9 to disassemble the first intermediate cover assembly 10, and slide the sliding fairing to place the pulley 6 at the corresponding position of the side slide rail 1 at the disassembly opening position, and then reversely insert the two positioning pins 12 on the first intermediate cover assembly 10 into the openings on the side wall of the side slide rail 1, so that the pulley 6 is located between the two positioning pins 12, thereby limiting the movement of the sliding fairing; wherein, the second limiting mechanism of the side slide rail 1 is formed by replacing the slide rail opening cover 11 and the two limiting pins 12.

[0014] Optionally, in the slide rail mechanism for the helicopter sliding fairing as described above, the buffer and limit mechanism 8 on each side slide rail 1 is arranged at the end of the slide rail; the buffer and limit mechanism 8 comprises: a rubber buffer block 14 and a spring sheet 15;

[0015] Among them, the spring sheet 15 is provided with a middle concave structure, the spring sheet 15 is connected to the side wall of the side slide rail 1 by a countersunk screw 9, the middle concave structure is embedded in the slide rail through the waist-shaped hole on the slide rail surface of the side slide rail 1, and the rubber buffer block 14 is fixedly connected to the inner side of the side wall of the side slide rail 1 by a large flat round head screw 23, so that a limiting space is formed between the middle concave structure of the spring sheet 15 and the rubber buffer block 14.

[0016] Optionally, in the slide rail mechanism for a helicopter sliding fairing as described above,

[0017] By adopting the buffering and limiting mechanism 8, during the opening process of the sliding fairing, the pulley 6 first collides with the spring sheet 15, and the movement of the sliding fairing is buffered by the extrusion deformation of the spring sheet 15. When the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail. Finally, the pulley 6 passes over the spring sheet 15 and hits the rubber buffer block 14, stops moving, and finally remains in the limiting space formed by the concave structure in the middle of the spring sheet 15 and the rubber buffer block 14.

[0018] Optionally, in the slide rail mechanism for the helicopter sliding fairing as described above, the first limit mechanism 7 provided at the disassembly opening position of the middle slide rail 3 comprises: a second middle blocking cover 17 and a countersunk screw 9;

[0019] The second middle blocking cover 17 is configured to be L-shaped, and its connecting portion is fixedly mounted on the side wall of the firewall 5 by countersunk screws 9, so that its slide rail portion and the middle slide rail 3 form an integral slide rail, thereby allowing the pulley 6 to slide between the middle slide rail 3 and the second middle blocking cover 17.

[0020] Optionally, in the slide rail mechanism for a helicopter sliding fairing as described above, the second limiting mechanism 16 of the intermediate slide rail 3 comprises: a Y-shaped member 19, a bracket 18, a hexagon head screw 20 and a support plate nut;

[0021] The bracket 18 is riveted to the side wall of the firewall 5 and is located below the disassembly opening 21 of the middle slide rail 3; the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3;

[0022] The bracket 18 is provided with four screw holes located below the disassembly opening 21, which are symmetrically arranged vertically and horizontally, and support plate nuts are installed on the screw holes; the Y-shaped member 19 is fixed to the bracket 18 by two hexagonal screws 20 arranged on the left and right.

[0023] Optionally, in the slide rail mechanism for the helicopter sliding fairing as described above, the limiting mode of the second limiting mechanism 16 of the middle slide rail 3 is:

[0024] When disassembling the sliding fairing, first remove the second middle plugging cover 1, place the pulley 6 at the middle disassembly opening 21 by sliding the sliding fairing, remove the Y-shaped piece 19, rotate it 90 degrees counterclockwise, and fix the Y-shaped piece 19 to the bracket 18 by two hexagonal screws 20 arranged at the top and bottom; thereby, the pulley joint 22 is constrained at the middle opening 21 of the slide rail by the Y-shaped piece 19.

[0025] In the second aspect, an embodiment of the present invention further provides a helicopter sliding fairing, comprising: three sets of pulleys 6 arranged on the sliding fairing, and three slide rails arranged on the fuselage platform, namely: two side slide rails 1 fixedly mounted on the power platform 4 and symmetrically arranged, and a middle slide rail 3 fixedly mounted on the side wall of one side of the firewall 5.

[0026] The beneficial effects of the present invention are as follows: the embodiments of the present invention provide a slide rail mechanism for a helicopter sliding fairing and a helicopter sliding fairing. On the one hand, the slide rail mechanism is composed of three slide rails arranged in a herringbone shape, providing a structural form of a three-slide rail arrangement. The slide rail mechanism is installed on a fixed platform, and a group of pulley mechanisms installed on the sliding fairing slide on the slide rail mechanism, and the fairing is opened and closed by rolling the pulleys in the slide rails. The middle disassembly openings of the slide rails in the slide rail mechanism are used for the pulleys of the sliding fairing to be disengaged upwards. On the other hand, a disassembly method for the sliding fairing is provided. When the helicopter sliding fairing is hoisted and disassembled in the field, due to the strong wind environment, the slide rail mechanism can be easily disassembled. The influence of the wind makes it impossible to fix the fairing, resulting in the pulley often not being aligned with the slide rail opening, causing damage to the sliding fairing, pulley and slide rail. This problem is solved by setting a second limit mechanism on each slide rail. On the other hand, strong winds and improper operation by operators can easily cause the sliding cover to open at too high a speed, causing excessive impact on the slide rail, causing damage to the pulley and slide rail parts. The buffering effect of the buffer and limit mechanism on the two symmetrically arranged side slide rails eliminates the occurrence of this problem. In addition, the setting of the second limit mechanism can ensure that the sliding fairing is always in the open position when there is wind in the outdoor field, thereby ensuring the safety and working space of the maintenance personnel.

[0027] The slide rail mechanism provided in the embodiment of the present invention ensures that the sliding fairing can be directly disassembled and assembled from the middle by arranging a disassembly and assembly opening in the middle of the slide rail, thereby avoiding interference with the front end and / or rear end structure of the sliding fairing, and effectively solves the problem of difficult or impossible disassembly and assembly; and through the reasonable design of the slide rail disassembly and assembly opening blocking cover, the risk of the slide rail possibly escaping from the opening during the sliding process is solved; through the reasonable design of the pulley limiting mechanism, the problem that the pulley and the slide rail disassembly and assembly opening cannot be aligned when disassembling and assembling the sliding cover is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0029] Figure 1 A schematic diagram of the overall structure of a slide rail mechanism for a helicopter sliding fairing provided by an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the overall structural arrangement of the side rails in the rail mechanism provided in the illustrated embodiment;

[0031] Figure 3 for Figure 2 A schematic structural diagram of a first limiting mechanism in a side slide rail provided in the illustrated embodiment;

[0032] Figure 4 for Figure 2 A schematic diagram of the structure of the second limiting mechanism in the side slide rail provided in the illustrated embodiment;

[0033] Figure 5 for Figure 4 A schematic diagram of the second limiting mechanism in the side slide rail provided in the illustrated embodiment limiting the position of the pulley;

[0034] Figure 6 for Figure 2 A schematic diagram of the structure of the buffer and limit mechanism in the side slide rail provided in the illustrated embodiment;

[0035] Figure 7 for Figure 6 A schematic diagram of the limiting relationship between the buffer and limiting mechanism in the side slide rail and the pulley mechanism provided in the illustrated embodiment;

[0036] Figure 8 for Figure 1 A schematic diagram of the overall structural arrangement of the middle slide rail in the slide rail mechanism provided in the illustrated embodiment;

[0037] Fig. 9 for Figure 8 A schematic structural diagram of a second limiting mechanism in the middle slide rail provided in the illustrated embodiment;

[0038] Fig.10 for Fig. 9 A schematic structural diagram of the second limiting mechanism in the middle slide rail for limiting the pulley provided in the illustrated embodiment. DETAILED DESCRIPTION

[0039] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0040] The above background technology has already explained the disassembly and assembly forms of the sliding fairing installed in the existing helicopter; however, when disassembling the sliding fairing from the front or rear end, there is often interference with the structural parts on the helicopter, which will make disassembly and assembly difficult or impossible.

[0041] In view of the above problems, an embodiment of the present invention provides a slide rail mechanism for a helicopter sliding fairing, in which two sets of slide rails are installed on a power platform in the helicopter, and another set of slide rails is installed on a firewall. Accordingly, corresponding positions of the sliding fairing have pulleys that can slide on each set of pulleys, and the fairing is opened and closed by rolling the pulleys in the slide rails at the corresponding positions.

[0042] The present invention provides the following specific embodiments which can be combined with each other. The same or similar concepts or processes may not be described in detail in some embodiments.

[0043] Figure 1 The overall structure diagram of a slide rail mechanism for a helicopter sliding fairing provided by an embodiment of the present invention is shown in FIG. Figure 1 The slide rail mechanism for a helicopter sliding fairing provided in an embodiment of the present invention may include: two side slide rails 1 fixedly mounted on a power platform 4 and symmetrically arranged, and a middle slide rail 3 fixedly mounted on a side wall of a firewall 5.

[0044] It should be noted that the power platform of the helicopter is horizontally arranged, the firewall is vertically arranged on the extension line of the central axis of the power platform, and the installation position of the firewall is close to the engine.

[0045] like Figure 1 In the slide rail mechanism shown, each slide rail is installed parallel to the heading direction, and a disassembly opening is provided in the middle position of each slide rail, which is used for the pulley 6 at the corresponding position on the sliding fairing to be removed from and installed in the disassembly opening when sliding on the slide rail at the corresponding position, and an intermediate blocking cover assembly is provided at each disassembly opening position to prevent the pulley 6 of the sliding fairing from escaping from the slide rail at the corresponding position during the sliding process.

[0046] Each slide rail in the embodiment of the present invention is provided with a first limiting mechanism 7 for preventing the pulley 6 at the corresponding position in the sliding fairing from escaping from the disassembly and assembly opening position of the slide rail; each slide rail is also provided with a second limiting mechanism for limiting and fixing the pulley 6 at the corresponding position in the sliding fairing at the disassembly and assembly opening position of the slide rail; and each side slide rail 1 is provided with a buffer and limiting mechanism 8 for limiting the pulley 6 at the corresponding position in the sliding fairing to the fully open position of the sliding fairing.

[0047] In an implementation of the embodiment of the present invention, the first limiting mechanism 7 provided at the disassembly opening position of each side rail 1 includes: a first middle blocking cover assembly 10 and a countersunk screw 9 .

[0048] In this implementation, the first intermediate blocking cover assembly 10 includes: a rail opening cover 11 whose inner profile is consistent with the inner profile of the side rail 1, and the connecting portion of the rail opening cover 11 is fixedly installed on the disassembly opening position of the side rail 1 by countersunk screws 9, so that the rail portion and the side rail 1 form an integral slideway, so that the pulley 6 slides between the side rail 1 and the rail opening cover 11; Figure 2 and Figure 3 shown. Figure 2 for Figure 1 A schematic diagram of the overall structural arrangement of the side rails in the rail mechanism provided in the illustrated embodiment; Figure 3 for Figure 2 A schematic structural diagram of a first limiting mechanism in a side slide rail provided in the illustrated embodiment.

[0049] Furthermore, the first middle blocking cover assembly 10 of each side slide rail 1 in this implementation also includes: two limit pins 12.

[0050] Correspondingly, the slide rail opening cover 11 is set to be L-shaped, and the two limit pins 12 are interference-fitted with the holes on the connecting portion of the slide rail opening cover 11;

[0051] The limiting method of the side slide rail 1 is: when the sliding fairing is not disassembled, the slide rail opening cover 11 is fixedly connected to the side wall of the side slide rail 1 through its connecting part, and forms an integral slideway with the side slide rail 1 through its slide rail part, and two limiting pins 12 are located on the back side of the side wall of the side slide rail 1.

[0052] When disassembling the sliding fairing, remove the countersunk screw 9 to remove the first intermediate blocking cover assembly 10, slide the sliding fairing to place the pulley 6 at the corresponding position of the side rail 1 at the disassembly opening position, and then reversely insert the two positioning pins 12 on the first intermediate blocking cover assembly 10 into the opening of the side rail 1 so that the pulley 6 is located between the two positioning pins 12, thereby limiting the movement of the sliding fairing; wherein, the second limiting mechanism of the side rail 1 is formed by replacing the rail opening blocking cover 11 and the two limiting pins 12. Figure 4 and Figure 5 As shown, Figure 4 for Figure 2 The schematic diagram of the structure of the second limiting mechanism in the side slide rail provided in the embodiment shown, Figure 5 for Figure 4 The illustrated embodiment provides a schematic diagram of a second limiting mechanism in a side slide rail limiting the position of a pulley.

[0053] In one implementation of the embodiment of the present invention, the buffer and limit mechanism 8 on each side rail 1 is arranged at the end of the rail; the buffer and limit mechanism 8 comprises: a rubber buffer block 14 and a spring sheet 15; Figure 2 shown.

[0054] In this implementation, the spring sheet 15 is provided with a middle concave structure, and the spring sheet 15 is connected to the side wall of the side slide rail 1 by a countersunk screw 9. The middle concave structure is embedded in the slide rail through the waist-shaped hole on the slide rail surface of the side slide rail 1. The rubber buffer block 14 is fixedly connected to the inner side of the side wall of the side slide rail 1 by a large flat round head screw 23, so that a limiting space is formed between the middle concave structure of the spring sheet 15 and the rubber buffer block 14.

[0055] The buffering and limiting method of the buffering and limiting mechanism 8 of this implementation is as follows: during the opening process of the sliding fairing, the pulley 6 first collides with the spring sheet 15, and the movement of the sliding fairing is buffered by the extrusion deformation of the spring sheet 15. When the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail. Finally, after the pulley 6 passes over the spring sheet 15, it hits the rubber buffer block 14, stops moving, and finally remains in the limiting space formed by the concave structure in the middle of the spring sheet 15 and the rubber buffer block 14; Figure 7 shown.

[0056] Further optionally, the rubber buffer block 14 is designed with an opening with a diameter of 2 mm to further buffer the impact force of the pulley when the sliding fairing is opened.

[0057] Figure 6 for Figure 2 The schematic diagram of the structure of the buffer and limit mechanism in the side slide rail provided in the embodiment shown, Figure 7 for Figure 6 The illustrated embodiment provides a schematic diagram of the limiting relationship between the buffer and limiting mechanism in the side slide rail and the pulley mechanism.

[0058] In an implementation of the embodiment of the present invention, the first limiting mechanism 7 provided at the disassembly opening position of the middle slide rail 3 includes: a second middle blocking cover 17 and a countersunk screw 9 .

[0059] In this implementation, the second middle cover 17 is L-shaped, and its connecting portion is fixedly mounted on the side wall of the firewall 5 by countersunk screws 9, so that its slide rail portion and the middle slide rail 3 form an integral slideway, so that the pulley 6 slides between the middle slide rail 3 and the second middle cover 17. Figure 8 As shown, Figure 1 The illustrated embodiment provides a schematic diagram of the overall structural arrangement of the middle slide rail in the slide rail mechanism, wherein the second middle blocking cover 17 and the second limiting mechanism 16 are illustrated.

[0060] In one implementation of the embodiment of the present invention, the second limiting mechanism 16 of the middle slide rail 3 includes: a Y-shaped member 19, a bracket 18, a hexagon head screw 20 and a support plate nut; Figures 8 to 10 shown.

[0061] In this implementation, the bracket 18 is riveted to the side wall of the firewall 5 and is located below the disassembly opening 21 of the middle slide rail 3 ; the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3 .

[0062] In this implementation, the bracket 18 is provided with four screw holes below the disassembly opening 21, which are symmetrical in vertical and horizontal arrangement, and support plate nuts are installed on the screw holes; the Y-shaped member 19 is fixed to the bracket 18 by two hexagon head screws 20 arranged on the left and right.

[0063] In this implementation, the limiting method of the second limiting mechanism 16 of the middle slide rail 3 is:

[0064] When disassembling the sliding fairing, first disassemble the second middle plug cover 1, slide the sliding fairing to place the pulley 6 at the middle disassembly opening 21, disassemble the Y-shaped piece 19, rotate it 90 degrees counterclockwise, and fix the Y-shaped piece 19 on the bracket 18 through the two hexagonal screws 20 arranged at the top and bottom; thus, the pulley joint 22 is constrained at the middle opening 21 of the slide rail by the Y-shaped piece 19. Fig.10 As shown, Fig. 9 A schematic structural diagram of the second limiting mechanism in the middle slide rail for limiting the pulley provided in the illustrated embodiment.

[0065] The slide rail mechanism for a helicopter sliding fairing provided in an embodiment of the present invention, on the one hand, is composed of three slide rails arranged in a herringbone shape, providing a structural form of a three-slide rail arrangement, wherein the slide rail mechanism is installed on a fixed platform, and a group of pulley mechanisms installed on the sliding fairing slide on the fixed platform, and the opening and closing of the fairing is completed by the rolling of the pulleys in the slide rails; the middle disassembly opening of each slide rail in the slide rail mechanism is used for the pulleys of the sliding fairing to be disengaged upward; on the other hand, a disassembly method for the sliding fairing is provided, and when the helicopter sliding fairing is hoisted and disassembled in the field, the whole fairing cannot be fixed due to the influence of the strong wind environment. The flow cover often causes the pulley to be misaligned with the slide rail opening, resulting in damage to the sliding fairing, pulley and slide rail. This problem is solved by setting a second limit mechanism on each slide rail; on the other hand, strong winds and improper operation by operators can easily cause the sliding cover to open at too high a speed, causing excessive impact on the slide rail, causing damage to the pulley and slide rail parts. The buffering effect of the buffer and limit mechanism on the two symmetrically arranged side slide rails eliminates the occurrence of this problem; in addition, the setting of the second limit mechanism can ensure that the sliding fairing is always in the open position when there is wind outside, ensuring the safety of the maintenance personnel and the working space.

[0066] The slide rail mechanism provided in the embodiment of the present invention ensures that the sliding fairing can be directly disassembled and assembled from the middle by arranging a disassembly and assembly opening in the middle of the slide rail, thereby avoiding interference with the front end and / or rear end structure of the sliding fairing, and effectively solves the problem of difficult or impossible disassembly and assembly; and through the reasonable design of the slide rail disassembly and assembly opening blocking cover, the risk of the slide rail possibly escaping from the opening during the sliding process is solved; through the reasonable design of the pulley limiting mechanism, the problem that the pulley and the slide rail disassembly and assembly opening cannot be aligned when disassembling and assembling the sliding cover is solved.

[0067] The following is a schematic illustration of an implementation example of the slide rail mechanism for a helicopter sliding fairing provided by an embodiment of the present invention.

[0068] Implementation Example

[0069] Reference Figures 1 to 10 The slide rail mechanism provided in this embodiment includes three slide rails, namely, a right slide rail 1, a left slide rail 2, and a middle slide rail 3. The right slide rail 1 and the left slide rail 2 are fixedly mounted on the power platform 4 by screws, and the right slide rail 1 and the left slide rail 2 are symmetrically arranged; the middle slide rail 3 is fixed to the longitudinal firewall 5 by screws, as shown in FIG. Figure 1 As shown, the firewall 5 is vertically arranged on the extension line of the central axis of the power platform 4, and the installation position of the firewall 5 is close to the engine.

[0070] like Figure 1 As shown, a disassembly and assembly opening is provided in the middle of each slide rail, and when disassembling and installing the sliding fairing, the pulley 6 at the corresponding position on the sliding fairing is removed from and installed in the disassembly and assembly opening of the slide rail at the corresponding position.

[0071] The slide rail mechanism provided in this implementation example has the following specific limiting mechanism:

[0072] Limiting mechanism 1: In order to prevent the risk of the pulley 6 falling out of the slide rail during use, a first limiting mechanism 7 is designed at the disassembly opening position of each slide rail; wherein, the first limiting mechanism 7 on the right side slide rail 1 and the left side slide rail 2 is specifically a first intermediate blocking cover assembly 10, such as Figure 3 As shown, the first limiting mechanism 7 on the middle slide rail 3 is specifically a second middle blocking cover assembly 17. Figure 8 As shown;

[0073] Limiting mechanism 2: In order to ensure that the pulley 6 is accurately fixed at the disassembly opening position of each slide rail when disassembling the sliding fairing, each slide rail in the sliding mechanism is also provided with a second limiting mechanism. The right slide rail 1 and the left slide rail 2 respectively fix the pulley 6 at the disassembly opening position of the slide rail through two limiting pins 12, and the middle slide rail 3 fixes the pulley joint 22 through the Y-shaped piece 19 to keep it at the disassembly opening position of the middle slide rail 3.

[0074] Buffering and limiting mechanism: Buffering and limiting mechanism are designed at the ends of the right side slide rail 1 and the left side slide rail 2, for example, including: rubber buffer block 14 and spring sheet 15, which are used to buffer and limit the sliding fairing when it slides open to the maximum opening position.

[0075] The limiting mechanisms on each slide rail in the embodiment of the present invention are described in detail as follows:

[0076] (1) The left side slide rail 2 is provided with a first limiting mechanism 7, a second limiting mechanism and a buffer and limiting mechanism 8; since the structures of the limiting mechanisms in the right side slide rail 1 in the embodiment of the present invention are exactly the same as those in the left side slide rail 2, the left side slide rail 2 is taken as an example for explanation:

[0077] 1.1, the first limiting mechanism 7 on the left side slide rail 2;

[0078] like Figure 2 As shown, the first limiting mechanism 7 in the left side slide rail includes a first intermediate blocking cover assembly 10 and a countersunk screw 9, wherein the inner profile of the slide rail opening cover 11 in the first intermediate blocking cover assembly 10 is designed to be consistent with the inner profile of the left side slide rail 2 to ensure smooth sliding of the pulley 6, and the slide rail opening cover 11 is fixedly connected to the left side slide rail 2 by a countersunk screw 9, as shown in FIG. Figure 3 As shown;

[0079] 1.2, the second limiting mechanism on the left side slide rail 2;

[0080] The first intermediate cover assembly 10 is composed of a slide rail opening cover 11 and a positioning pin 12. The positioning pin 12 and the hole of the slide rail opening cover 11 are set to be interference fit and are installed together by hot and cold methods. Figure 4 As shown; when the sliding fairing is not removed, the first middle plugging cover assembly 10 is fixedly connected to the side wall of the left side slide rail 2 by the countersunk screw 9; when the sliding fairing is removed, the first middle plugging cover assembly 10 is removed first, and the pulley 6 at the corresponding position is placed in the middle disassembly opening position by sliding the sliding fairing, and then the positioning pin 12 on the middle plugging cover assembly 10 is reversely inserted into the opening of the side wall of the left side slide rail 2. At this time, the pulley 6 is located between the two positioning pins 12, which constrains the movement of the fairing, as shown in FIG. Figure 5 shown.

[0081] 1.3, buffer and limit mechanism 8 on the left side slide rail 2;

[0082] The buffer and limit mechanism 8 of the left side slide rail 2 includes a rubber buffer block 14 and a spring sheet 15. The spring sheet 15 is provided with a middle concave structure. The spring sheet 15 is connected to the side wall of the left side slide rail 2 by a countersunk screw 9. The middle concave structure is embedded in the slide rail through a waist-shaped hole on the slide rail surface of the left side slide rail 2. The rubber buffer block 14 is fixedly connected to the side wall of the left side slide rail 2 by a large flat round head screw 23. Figure 6 As shown in the figure, a limiting space is formed between the concave structure in the middle of the spring sheet 15 and the rubber buffer block 14; during the opening process of the sliding fairing, the pulley 6 first collides with the spring sheet 15, and the movement of the sliding fairing is buffered by the extrusion deformation of the spring sheet 15. When the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail. Finally, the pulley 6 passes over the spring sheet 15 and hits the rubber buffer block 14, stops moving, and finally remains in the limiting space formed by the concave structure in the middle of the spring sheet 15 and the rubber buffer block 14, as shown in the figure. Figure 7 The rubber buffer block (14) is designed with a 2 mm diameter opening to further buffer the impact of the pulley when the sliding fairing is opened.

[0083] (2) The middle slide rail 3 is provided with a first limiting mechanism 7 and a second limiting mechanism 16:

[0084] 2.1, the first limiting mechanism 7 on the middle slide rail 3;

[0085] like Figure 8 As shown, the first limiting mechanism 7 in the middle slide rail 3 includes a second middle blocking cover 17 and a countersunk screw 9; the second middle blocking cover 17 is set to be L-shaped, and the countersunk screw 9 is used to fix its connecting part on the side wall of the firewall 5, so that its slide rail part and the middle slide rail 3 form an integral slideway, so that the pulley 6 slides between the middle slide rail 3 and the second middle blocking cover 17; Figure 8 shown.

[0086] 2.2, the middle slide rail 3 is designed with a second limiting mechanism 16, such as Figure 8 As shown; the second limiting mechanism 16 of the middle slide rail 3 is composed of a Y-shaped member 19 and a bracket 18. The bracket 18 is riveted to the side wall of the firewall 5 and is located below the disassembly opening 21 of the middle slide rail 3. In addition, the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3, for example, protruding 1mm, and 4 screw holes are designed on the bracket 18, which are symmetrical in the upper and lower parts and symmetrical in the left and right parts. The screw holes are equipped with support plate nuts. The Y-shaped member 19 is installed on the bracket 18 by two left and right hexagonal screws 20, as shown in FIG. Fig. 9 shown.

[0087] When disassembling the sliding fairing, first disassemble the second middle plug cover 17, slide the sliding fairing to place the pulley 6 at the middle disassembly opening 21, disassemble the Y-shaped piece 19, rotate it 90 degrees counterclockwise, and fix the Y-shaped piece 19 on the bracket 18 through the two hexagonal screws 20 arranged at the upper and lower parts. Use the Y-shaped piece 19 to constrain the pulley joint 22 at the middle opening 21 of the slide rail, as shown in FIG. Fig.10 shown.

[0088] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A slide rail mechanism for a helicopter sliding fairing, characterized in that: include: Three slide rails, namely: two side slide rails (1) fixedly mounted on the power platform (4) and symmetrically arranged, and a middle slide rail (3) fixedly mounted on a side wall of a firewall (5); Each slide rail is installed in parallel along the heading direction, and a disassembly opening is provided at the middle position of each slide rail, which is used for the pulley (6) at the corresponding position on the sliding fairing to be removed from and installed in the disassembly opening when sliding on the slide rail at the corresponding position, and an intermediate blocking cover assembly is provided at each disassembly opening position to prevent the pulley (6) of the sliding fairing from being removed from the slide rail at the corresponding position during the sliding process; Each slide rail is provided with a first limiting mechanism (7) for preventing the pulley (6) at the corresponding position in the sliding fairing from escaping from the disassembly opening position of the slide rail; each slide rail is also provided with a second limiting mechanism for limiting (fixing) the pulley (6) at the corresponding position in the sliding fairing at the disassembly opening position of the slide rail; and each side slide rail (1) is provided with a buffer and limiting mechanism (8) for limiting the pulley (6) at the corresponding position in the sliding fairing at the fully opened position of the sliding fairing.

2. The slide rail mechanism for a helicopter sliding fairing according to claim 1, characterized in that: A first limiting mechanism (7) provided at the disassembly opening position of each side slide rail (1) comprises: a first intermediate blocking cover assembly (10) and a countersunk screw (9); The first intermediate blocking cover assembly (10) comprises: a rail opening cover (11) whose inner profile is consistent with the inner profile of the side rail (1); the connecting portion of the rail opening cover (11) is fixedly installed on the disassembly opening position of the side rail (1) by means of countersunk screws (9), so that the rail portion and the side rail (1) form an integral slideway, thereby allowing the pulley (6) to slide between the side rail (1) and the rail opening cover (11).

3. The slide rail mechanism for a helicopter sliding fairing according to claim 2, characterized in that: The first middle blocking cover assembly (10) of each side slide rail (1) further comprises: two limit pins (12); The slide rail opening cover (11) is configured to be L-shaped, and the two limit pins (12) are interference-fitted with the holes on the connecting portion of the slide rail opening cover (11); The limiting method of the side slide rail (1) is as follows: when the sliding fairing is not disassembled, the slide rail opening cover (11) is fixedly connected to the side wall of the side slide rail (1) through its connecting part, and forms an integral slideway with the side slide rail (1) through its slide rail part, and two limiting pins (12) are located on the back side of the side wall of the side slide rail (1); When disassembling the sliding fairing, remove the countersunk screw (9) to disassemble the first intermediate cover assembly (10), and slide the sliding fairing to place the pulley (6) at the corresponding position of the side slide rail (1) at the disassembly opening position, and then reversely insert the two positioning pins (12) on the first intermediate cover assembly (10) into the opening of the side slide rail (1) so that the pulley (6) is located between the two positioning pins (12), thereby limiting the movement of the sliding fairing; wherein, the second limiting mechanism of the side slide rail (1) is formed by replacing the slide rail opening cover (11) and the two limiting pins (12).

4. The slide rail mechanism for a helicopter sliding fairing according to claim 3, characterized in that: The buffer and limit mechanism (8) on each side slide rail (1) is arranged at the end of the slide rail; the buffer and limit mechanism (8) comprises: a rubber buffer block (14) and a spring sheet (15); The spring sheet (15) is provided with a middle concave structure, the spring sheet (15) is connected to the side wall of the side slide rail (1) by means of a countersunk screw (9), the middle concave structure is embedded in the slide rail through a waist-shaped hole on the upper slide rail surface of the side slide rail (1), and the rubber buffer block (14) is fixedly connected to the inner side of the side wall of the side slide rail (1) by means of a large flat round head screw (23), so that a limiting space is formed between the middle concave structure of the spring sheet (15) and the rubber buffer block (14).

5. The slide rail mechanism for a helicopter sliding fairing according to claim 4, characterized in that: By adopting the buffer and limit mechanism (8), during the opening process of the sliding fairing, the pulley (6) first collides with the spring sheet (15), and the movement of the sliding fairing is buffered by the extrusion deformation of the spring sheet (15). When the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail. Finally, after the pulley 6 passes over the spring sheet 15, it hits the rubber buffer block (14), stops moving, and finally remains in the limit space formed by the concave structure in the middle of the spring sheet (15) and the rubber buffer block (14).

6. The slide rail mechanism for a helicopter sliding fairing according to claim 1, characterized in that: The first limiting mechanism (7) provided at the disassembly opening position of the middle slide rail (3) comprises: a second middle blocking cover (17) and a countersunk screw (9); The second middle blocking cover (17) is configured to be L-shaped, and its connecting portion is fixedly mounted on the side wall of the firewall (5) by countersunk screws (9), so that its slide rail portion and the middle slide rail (3) form an integral slide rail, thereby allowing the pulley (6) to slide between the middle slide rail (3) and the second middle blocking cover (17).

7. The slide rail mechanism for a helicopter sliding fairing according to claim 6, characterized in that: The second limiting mechanism (16) of the middle slide rail (3) comprises: a Y-shaped member (19), a bracket (18), a hexagon head screw (20) and a support plate nut; The bracket (18) is riveted to the side wall of the firewall (5) and is located below the disassembly opening (21) of the middle slide rail (3); the lateral thickness of the bracket (18) is greater than the lateral thickness of the middle slide rail (3); The bracket (18) is provided with four screw holes located below the disassembly opening (21), which are symmetrically arranged vertically and horizontally, and support plate nuts are installed on the screw holes; the Y-shaped member (19) is fixed to the bracket (18) by two hexagonal screws (20) arranged on the left and right.

8. The slide rail mechanism for a helicopter sliding fairing according to claim 7, characterized in that: The limiting method of the second limiting mechanism (16) of the middle slide rail (3) is: When disassembling the sliding fairing, first disassemble the second middle plugging cover (1), place the pulley (6) at the middle disassembly opening (21) by sliding the sliding fairing, disassemble the Y-shaped member (19), rotate it counterclockwise by 90 degrees, and then fix the Y-shaped member (19) to the bracket (18) by two hexagonal screws (20) arranged at the top and bottom; thereby, the pulley joint (22) is constrained at the middle opening (21) of the slide rail by the Y-shaped member (19).

9. A helicopter sliding fairing, characterized in that: include: The three sets of pulleys (6) arranged on the sliding fairing and the three slide rails arranged on the body platform are respectively: two side slide rails (1) fixedly mounted on the power platform (4) and symmetrically arranged, and a middle slide rail (3) fixedly mounted on the side wall of one side of the firewall (5).

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